Yeah, they've done some DNA testing recently and found that to be the case. Might not be an issue in Spain, but I surely don't know.

I know that they've found that some farmers are giving their pigs 'cerdos ibericos de bellota' (fed only acorns) some kind of chemical to trick the tests into believing that the pigs are fed acorns when they're not. If people would contaminate the sacred cerdos ibericos here then it isn't a stretch to think that they would do the same to canned fish...unfortunately...

The biggest problem with olive oil is in the imported stuff. It's exported from various countries in bulk, then sold by brokers who up their profits by mixing in cheaper oils. Some of Costco's olive oil is imported from Italy, and some comes from California. The one I bought from Amazon (nearest Costco is 300+ miles away) stated that it was imported, so I guess I got screwed. But the point is that if they label it from California, it's most likely pure.

"Right is right, even if no one is doing it; wrong is wrong, even if everyone is doing it." - St. Augustine